The world's wild animal population has declined by more than two-thirds in just 50 years, according to a scientific report.
Humanity is "losing the war" to save nature, warns the World Wildlife Fund's biennial report, 'Living Planet'.
The researchers used data from the Zoological Society of London on the status of 32,000 wild animal populations.
They comprise more than 5,000 species and found that population sizes had declined by an average of 69 percent since 1970.
Deforestation, human exploitation, pollution and climate change were the biggest drivers of the loss.
The rapid decline shows "that nature is falling apart and the natural world is being emptied", said Andrew Terry, director of conservation and policy at the Zoological Society of London.
Which parts of the world are worst hit by species decline?
Wildlife populations in Latin America and the Caribbean were particularly hard hit, experiencing a 94 percent decline in just fifty years.
Africa had the second largest decline at 66 percent, followed by Asia and the Pacific at 55 percent.
North American animal populations declined by an average of 20 percent, while Europe and Central Asia suffered an 18 percent decline.
Some species have experienced large declines in short periods of time.
For example, a population of pink river dolphins in the Brazilian Amazon declined by 65 percent between 1994 and 2016, the report says.